Tire-gage.



' H. McN. SHWAB."

TIRE GAGE. APPLICATION -Fu.'n MAY n. 1918.

Patented Apr. 29,1919.

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I WITNESSES ATTORNEYS I aernaenroiamoa mien mumm s ame, or toui'svrt'rin, KENTUCKY.

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To-allwhom it may concern:

Be 'it known that I, HUGH 'MoNmLn-Y SHWAB, a' citizen of'the United States, and a resident of Louisville, in the county of J efferson and State of Kentucky, have .invented' a new and Improved'Tir'e-Gagd of which the following is a full,.clea r, and exact dez-scription.v 1 This invention 1n matic tires,- and has for an object the provision of an improved arrangement which may be attached at any time to any ordinary valve now in use for indicating the air pres- [sure in .the tire.

. 15.11 Another object of the invention is the prosion of a gage which may be connected to i provided. with m'eans whereby the tire may be pumped while the gage is 1n place and mdicate during the pumping operation the air'p'ressure in the tire. I

In the accompanying drawmg: Figure l'is a'side'view of the gage embodying the invention, certain parts being broken away for better illustrating thecon- .struction. I

Fig. 2 is a sectional view through Fig. 1

on line 2-2.

bynumerals, 1 indicates a .felly of any desired kind on which is mounted a tire carrying a valve stem 2, which maybe of any desired structure, as for instance of the Schrader type. The valve stem 2 isprovided with a valve mechanism, as shown in Fig.

2, including a valve member 3 which is con- Y nected with a rod 4 usually extending above the end of the stem so that when it is desired to release the air in the tire to which the stem is connected rod 4 may be depressed and valve 3 unseated. It will, of course, be understood that when a pumpis connected with the upper part 5 of the stem 2 and operated, air will pass through the valve stem and to unseat valve 3 as it'pa sses so that the t re maybe inflated. "In small tires, as for 1nstance bicycle tires the inflating thereof may be regulated by the pressure of the hand to determine whether or not the tire 1s sufliso ciently provided withcompressedair to sussary to use some gage, either in the pump,

hose from the pump, or on the valve stem.

In the present-invention meansThave'been.

relates to gages for pneu- Specifica'tion of Letters Patent. Patented Apll o 11.9119 Application filed ma 11, leis. Serial no. 232948.

provided which .are designed to be posi tioned on an ordinary valve for determining whether or not the air pressure in the tire is casing 6 is threaded on to the stem 2 and is provided with a threaded section 7 for receivmg a sleeve 8, whlch sleeve carries a reclprocatlng pin 9 having an enlargement 10 at the lower end which is designed to engage the upper end of the rod 4 for depressing said rod and unseating valve member 3 as soon s thecasing 6 has been screwed into position'on stem 2. A collar 11 is secured a tothh pin 9' by a set screw or other desired, the valve of an ordinary tire and which is" means and is acted on by spring 12 so as to I stronger than the spring 13 of the valve I mechanism in stem 2, in .order that the valve member 3 may be opened against the action of spr ng 13. Above the sleeve 8 is a distributing chamber 14 for the air whereby air entering through an auxiliary stem 15 may be distributed to a gage mechanism I through aperture 16 and distributed to the Referring to the accompanying drawing which may be identical with the valve mechanism in stem 2 or may be any desired kind.

The valve mechanism17 is provided so that in case there isnot sufficient airin the tire after the device has been applied theretothe 'pumpmaybe secured to the auxiliary stem 15 and'air supplied to chamber-14 and thence into the tire. Of course a small part of the air will pass through theopening 16 into the space 18 in a bracket 19 and thence intoan expansible member 20, which is in the form of a flat tube bent into an arc-shaped strucw I 100 tureas shown in Fig. 1. As the pressure in the chamber 14 rises the pressure in member. 20 as well as in the tire will rise and will move a dial 21, which is connected through a lever 22 and link 23, which in turn is con nected pivotally to the'free end of the expansible member 20. The dial 21 and associate parts includingmember 20 are inclosed in a casing 24 which has a window 25'whereby the numbers on the dial 21 may be seen.

The parts are set in the drawing tq show a movement of one hundred indicating'that one hundred pounds per inch is the limit of could be provided and arranged to rest on the shoulder oi the stem 2 and against'the show the amount of pressure inthe tire.

shoulderj27 of easing 6. The-casing G'and associate parts could be applied to each valve stem of an automobile'and left thereon con vti nually or could be .applied' when desired and then removed when the tire had'been properly pumped. Ifthe device is left in place continually the dial 21- will continually What I claim is: I A gage comprising a casing having a bore atone end provided with threads near the upper part of the bore, a valve mechanism in said bore, said casing being provided with.

a second bore extending from the opposite endfof the casing, the end of said second mentioned bore merging into a passageway communicating with the first mentioned bore, said second mentioned bore having compartmentsof three different sizes, the end bore being. threaded for its'entire length while the third compartment from the end is threaded for part of its length, a sleeve threaded into the third compartment, said sleeve being formed with gulding means, 'a V pin extending through said guiding means, a ispring normally holding said pin in a lower .position for. engaging the plunger of the Valve to which the device is to be applied so as to open the same whereby the-connecting member of the valve will be in directcommun1cat1on with said second mentioned bore,

and atpressure operated indicator in free communication with the interior of the casing between said valves.

HUGH MGNEILLY SHlVA-B. 

